VOICE OVER INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM

    公开(公告)号:US20230047609A1

    公开(公告)日:2023-02-16

    申请号:US17847116

    申请日:2022-06-22

    Applicant: Apple Inc.

    Abstract: This disclosure describes a communication system associated with a radio access technology (RAT). The communication system includes an Internet protocol (IP) multimedia subsystem (IMS) server, and one or more processors configured to perform operations. The operations include receiving, from a user equipment device (UE) camped on the RAT, a request for IMS Packet Data Unit (PDU) establishment or IMS session initiation protocol (SIP) registration; sending to the UE a rejection message associated with the SIP registration or the IMS PDU establishment; receiving, from the UE, an IMS failure message that comprises an IMS failure cause; determining, based on the IMS failure message, whether the IMS failure cause is temporary or permanent; and responsive to determining that the IMS failure is temporary, temporarily disabling the RAT for the UE.

    Handling of timer expiry for MT CSFB

    公开(公告)号:US11044786B2

    公开(公告)日:2021-06-22

    申请号:US16489222

    申请日:2018-06-27

    Applicant: APPLE INC.

    Abstract: Apparatuses and computer-readable storage media for handling timers for mobile terminated circuit-switched fallback (MT CSFB) calls. An apparatus for a user equipment (UE) includes processing circuitry operably coupled to a data storage device. The data storage device is configured to store a value of an extended service request for mobile terminated services (EXT-MT) timer. The value of the EXT-MT timer is less than a value of a guard timer of a Visitor Location Register (VLR). The processing circuitry is configured to start the EXT-MT timer and generate an extended service request message to be transmitted to a Mobility Management Entity (MME) responsive to a paging for an MT CSFB call, and attempt to select a radio access technology of a different type of network if the EXT-MT timer expires before the UE successfully performs inter system change and a circuit switched fallback cancellation request was not received from a subscriber.

    VOICE OVER INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM

    公开(公告)号:US20230047063A1

    公开(公告)日:2023-02-16

    申请号:US17847126

    申请日:2022-06-22

    Applicant: Apple Inc.

    Abstract: This disclosure describes a user equipment device (UE). The UE includes one or more antennas; one or more radios, where each of the radios is configured to perform cellular communication using a plurality of radio access technologies (RATs) that support voice over an Internet protocol (IP) multimedia subsystem (IMS); one or more processors coupled to the one or more radios, where the one or more processors are configured to cause the UE to perform operations including: sending, via a first RAT, a first request for IMS registration to an IMS server; receiving, from the IMS server, an IMS rejection message indicating failure of the IMS registration; determining, based on the IMS rejection message, that the IMS registration failure is temporary; responsively re-attempting IMS registration with the IMS server; and determining to camp on the first RAT in response to receiving an IMS acceptance message from the IMS server.

    VOICE OVER INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM

    公开(公告)号:US20230412649A1

    公开(公告)日:2023-12-21

    申请号:US18239832

    申请日:2023-08-30

    Applicant: Apple Inc.

    CPC classification number: H04L65/1045 H04L65/1016 H04L65/1069

    Abstract: This disclosure describes a communication system associated with a radio access technology (RAT). The communication system includes an Internet protocol (IP) multimedia subsystem (IMS) server, and one or more processors configured to perform operations. The operations include receiving, from a user equipment device (UE) camped on the RAT, a request for IMS Packet Data Unit (PDU) establishment or IMS session initiation protocol (SIP) registration; sending to the UE a rejection message associated with the SIP registration or the IMS PDU establishment; receiving, from the UE, an IMS failure message that comprises an IMS failure cause; determining, based on the IMS failure message, whether the IMS failure cause is temporary or permanent; and responsive to determining that the IMS failure is temporary, temporarily disabling the RAT for the UE.

    Enhanced Network Slicing for Public Land Mobile Network Selection While Roaming

    公开(公告)号:US20210297940A1

    公开(公告)日:2021-09-23

    申请号:US17200122

    申请日:2021-03-12

    Applicant: Apple Inc.

    Abstract: User equipment devices (UEs) and methods are described for performing single network slice selection assistance information (S-NSSAI)-aware public land mobile network (PLMN) selection in a roaming scenario. A mapping list is received that includes a mapping of a plurality of public land mobile networks (PLMNs) to corresponding S-NSSAI values. The mapping list is received from a home PLMN (HPLMN) of the UE over non-3rd generation partnership (non-3GPP) access, from a server, or from a Universal Mobile Telecommunications Service (UMTS) subscriber identity module (USIM) of the UE. An available PLMN is determined that is mapped to a preferred S-NSSAI value of the UE based on the mapping list. A connection is established with the available PLMN.

    Power Saving Methods for Multi-Subscriber Identity Module Devices

    公开(公告)号:US20250063497A1

    公开(公告)日:2025-02-20

    申请号:US18450493

    申请日:2023-08-16

    Applicant: Apple Inc.

    Abstract: A wireless device may transmit, using a first SIM associated with a first radio, a first attach request to a network node and transmit, using a second SIM associated with a second radio, a second attach request to the network node. Additionally, the wireless device may receive, operating in a multiple-subscriber identity module (MSIM) mode, an attach reject message including an attach reject cause code from the network node. The wireless device may transition, based at least in part on reception of the attach reject message, the second SIM to a limited service camped state, disable one of the first radio or second radio, transition to a single-SIM mode, and communicate with the network node via the first SIM.

    Voice over internet protocol multimedia subsystem

    公开(公告)号:US12212609B2

    公开(公告)日:2025-01-28

    申请号:US17847126

    申请日:2022-06-22

    Applicant: Apple Inc.

    Abstract: This disclosure describes a user equipment device (UE). The UE includes one or more antennas; one or more radios, where each of the radios is configured to perform cellular communication using a plurality of radio access technologies (RATs) that support voice over an Internet protocol (IP) multimedia subsystem (IMS); one or more processors coupled to the one or more radios, where the one or more processors are configured to cause the UE to perform operations including: sending, via a first RAT, a first request for IMS registration to an IMS server; receiving, from the IMS server, an IMS rejection message indicating failure of the IMS registration; determining, based on the IMS rejection message, that the IMS registration failure is temporary; responsively re-attempting IMS registration with the IMS server; and determining to camp on the first RAT in response to receiving an IMS acceptance message from the IMS server.

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